JailbreakSaving'Semi-Restore'SoftwareCurrentlyInTheWorks

Jailbreakers will know the danger of restoring one's iDevice is that iTunes will auto-upgrade the firmware on an iPhone, iPad, or iPod touch, potentially to an "un-jailbreakable" version of Apple's mobile operating system. However, one forthcoming app for Windows, OS X, and Linux promises to allow users to perform a "semi-restore" on their iDevice - that is, to part-restore one's iPhone or iPad without having iTunes upgrade to a newer version of the iOS.
The news reached us from iDownloadBlog, who explains:

That’s where a new app called Semi-Restore claims to be able to help. It will, according to its website, allow jailbroken users to refresh their devices with the firmware that’s currently on the device. For example, if you’re running iOS 6.1.2, you can clean the device and semi-restore to 6.1.2. It’s not a full restore, because doing so would force you to upgrade, but it might be the next best thing, especially if your device is having problems or is running slow.